1 . 他现在能骑自行车了, 但几星期前他不会。 (用情态动词完成句子)
He can ride a bike now, but________________.

2 . 我想了又想,   但我记不起我在哪里买的词典。(用情态动词完成句子)
I have searched my memory, but I ________________ where I have bought the dictionary.

3 . 选词填空。
1. He ________(must/might) get here in time ,but I can’t be sure.
2. He ________(can’t/mustn’t) have missed the train; he arrrived at the train station two hours early.
3. That must be a mistake. No, it ________(can’t/mustn’t) be a mistake.
4. Paul did a great job in the speech contest. He ________(must/can) have practised many times last week.
5. He ________(may/must) be at his office now, but you’d better make a phone to make sure.
6. Look, someone’s in the room. Who ________(can/must) it be ?
7. It ________(must have /may have) rained last night, for the ground is still wet.
8. I don’t know where she is, she ________(may/must) be in Wuhan.
9. With drones’ ability to see ahead, they ________(could/should ) signal any problem, so that fast -moving trains would be able to react in time.
10. I ________(needn’t/can’t) have bought so much wine -only two people came.

5 . 我妹妹总是把闹钟定在早上6点，这样她就能早起赶上公共汽车。
My younger sister always sets the alarm clock at 6：00 a. m._______________.

7 . 音乐可以使我们放松身心，帮助缓解我们在工作和生活中的压力。（汉译英）

8 . 这是一份你能从中学到一些东西的工作。
This is a job ________ something.

10 . 那取决于你是否能做好这份工作。
It depends on ________ ________ ________ do the work well or not.